Deaths and Dozens of Injuries After Explosions at Boston Marathon

BOSTON (AP) -- Boston police say no suspect has been taken into custody in connection with the explosions near the finish line of the Boston Marathon. Police Commissioner Edward Davis also says that the fire at a library a few miles away and more than an hour later doesn't appear to be related to the explosions at the race on Monday. He says the fire may have been caused by an incendiary device. Authorities say the blasts killed two people and injured at least 73. Police say it's too early to get into specifics about the nature of devices or whether shrapnel was involved.

UPDATE 5:00 PM

WASHINGTON (AP) -- A law enforcement official says cellphone service has been shut down in the Boston area to prevent any potential remote detonations of explosives. Authorities have not identified what caused the explosives that erupted at the finish line of the Boston Marathon. The official was speaking on condition of anonymity because the investigation was ongoing. The explosions have killed two people and injured at least 23 others.

LOS ANGELES (AP) -- Police in Los Angeles, New York City, London and other cities worldwide are stepping up security following explosions at the Boston Marathon. Los Angeles County Sheriff's spokesman Steve Whitmore says the department has opened an emergency operations center, increased patrols for transit and other critical areas including the Los Angeles Dodgers game Monday night Chief NYPD spokesman Paul Browne said Monday that critical response teams are deployed around the city. Officials are stepping up security at hotels and other prominent locations. British police also say they are reviewing security plans for Sunday's London Marathon. It's the next major international marathon. A London Metropolitan Police spokesman says police are working with marathon officials to review security plans.

WASHINGTON (AP) -- The White House says President Barack Obama has called Boston's mayor and the Massachusetts governor to express his concern for those injured in the Boston Marathon explosions. Obama is quoted as telling Mayor Tom Menino and Gov. Deval Patrick that his administration would provide whatever support was needed in responding to the incident. The president was briefed on the explosions by Homeland Security adviser Lisa Monaco shortly after 3 p.m., Eastern time. Shortly after the explosions, Secret Service shut down Pennsylvania Avenue outside the White House, cordoning off the area with yellow police tape. Several Secret Service patrol cars also blocked off the entry points to the road. The White House was not on lockdown and tourists and other onlookers were still able to be in the park across the street from the executive mansion.----------------------------------------------------------------------------------------------

UPDATE 4:25 PM

WASHINGTON (AP) -- The Federal Aviation Administration is warning pilots that it has created a no-fly zone over the site of two explosions at the annual Boston marathon. The agency said in a notice issued Monday about an hour after the explosions that a no-fly zone with a 3.5-mile radius has been created over 811 Boylston Street. The zone is limited to flights under 3,000 feet in altitude, which is lower than most airliners would fly except when taking off or landing. The notice says the no-fly zone is effective immediately and will remain in effect until further notice. Pilots planning flights were urged to call their local flight service station.

----------------------------------------------------------------------------------------------- BOSTON (AP) -- Two explosions at the finish line of the Boston Marathon have resulted in injuries. Bloody spectators were being carried Monday to the medical tent that had been set up to care for fatigued runners. Police wove through competitors as they ran back toward the course. "There are a lot of people down," said one man, whose bib No. 17528 identified him as Frank Deruyter of North Carolina. He was not injured, but marathon workers were carrying one woman, who did not appear to be a runner, to the medical area as blood gushed from her leg. A Boston police officer was wheeled from the course with a leg injury that was bleeding. About three hours after the winners crossed the line, there was a loud explosion on the north side of Boylston Street, just before the photo bridge that marks the finish line. Another explosion could be heard a few seconds later.

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